Aquarium Castle

A castle / tower thing for an aquarium. It is inspired by https://www.thingiverse.com/thing:1894187 but I created the model myself from scratch. Included some tabs so it could be held down under the sand.

Everything I've looked into says that ABS or PLA 'should' be safe (perhaps colourants could be a problem) in the aquarium but PLA will most likely degrade.

20% + infill should also assist in it not floating.